Drain pipe



FIG. 1 is a perspective view of a drain pipe showing my new design;

FIG. 2 is an elevational view taken from one side thereof;

FIG. 3 is an elevational view taken from one end thereof;

FIG. 4 is an elevational view taken from the side opposite that shown in FIG. 2;

FIG. 5 is an elevational view taken from the end opposite that shown in FIG. 3;

FIG. 6 is a top plan view thereof; and

FIG. 7 is a bottom plan view thereof. 

The ornamental design for a drain pipe, as shown and described. 